Fix a memory leak in sensors_read_one_sysfs_chip() when an error occurs.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@4635 7894878c-1315-0410-8ee3-d5d059ff63e0

CHANGES

@@ -2,8 +2,10 @@ lm_sensors CHANGES file
 -----------------------
 
 SVN HEAD
+  Library: Fix a memory leak on error
   Module i2c-piix4: Add ATI SB700 support (2.6 backport)
 
+
 2.10.4 (20070716)
   File doc/vid: Update the sysfs paths, update the chip lists
   File i2c-dev.h: Support I2C block reads with specified length

lib/sysfs.c

@@ -21,6 +21,7 @@
 #define _GNU_SOURCE
 
 #include <string.h>
+#include <stdlib.h>
 #include <limits.h>
 #include <errno.h>
 #include <sysfs/libsysfs.h>
@@ -83,8 +84,10 @@ static int sensors_read_one_sysfs_chip(struct sysfs_device *dev)
 				sensors_sysfs_mount, entry.name.bus);
 
 			if ((bus_attr = sysfs_open_attribute(bus_path))) {
-				if (sysfs_read_attribute(bus_attr))
-					return -SENSORS_ERR_PARSE;
+				if (sysfs_read_attribute(bus_attr)) {
+					sysfs_close_attribute(bus_attr);
+					goto exit_free;
+				}
 
 				if (bus_attr->value
 				 && !strncmp(bus_attr->value, "ISA ", 4))
@@ -101,11 +104,16 @@ static int sensors_read_one_sysfs_chip(struct sysfs_device *dev)
 		entry.name.addr = (domain << 16) + (bus << 8) + (slot << 3) + fn;
 		entry.name.bus = SENSORS_CHIP_NAME_BUS_PCI;
 	} else
-		return -SENSORS_ERR_PARSE;
+		goto exit_free;
 
 	sensors_add_proc_chips(&entry);
 
 	return 0;
+
+exit_free:
+	free(entry.name.prefix);
+	free(entry.name.busname);
+	return -SENSORS_ERR_PARSE;
 }
 
 /* returns 0 if successful, !0 otherwise */